State police said a heart problem killed the driver of a tractor trailer that crashed earlier this week in Franklin County.

Police issued a news release early Thursday morning that said 51-year-old Steven Lee Winfrey of Roanoke, Virginia suffered “an acute cardiac event” just before his truck left the Interstate. His death was listed as “natural.”

The crash happened on I-81 north near exit 10 in Guilford Township, Franklin County. Police said the tractor trailer struck a cement culvert and burst into flames.